for the following products
Boc-L-Lys(iPr,Z)-OH | Boc-Lys(Isp,Z)-OH | Boc-Lys(Z)(isopropyl)-OH (oil) | N-alpha-tert-Butyloxycarbonyl-N-epsilon-benzyloxycarbonyl-N-epsilon-i-propyl-L-lysine and Nalpha-Boc-Nepsilon-isopropyl-Nepsilon-z-L-lysine dicyclohexylammonium salt
